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2003 GMC C1500 DTC's that keep appearing.

Tiny
TERRY HUNTER
  • MEMBER
  • 2003 GMC C1500
  • V8
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
When its cold outside, and I start up my truck, the engine light blinks for a while and then goes out. The code is reading multiple misfire (P0300). How do I fix this problem? I've changed the fuel filter, plugs and wires, and flushed the fuel lines. I also just got another DTC. Its (B2752) and I cant seam to find out what that means.
Please help. My poor truck is running rough!
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Wednesday, November 12th, 2008 AT 3:33 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Random Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

B2752 deals with the horn relay coil circuit low
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Wednesday, November 12th, 2008 AT 3:44 PM

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